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DOI | 10.1038/s41467-017-02275-9 |
In situ atomistic observation of disconnection-mediated grain boundary migration | |
Zhu, Qi1,2; Cao, Guang1,2; Wang, Jiangwei1,2; Deng, Chuang3; Li, Jixue1,2; Zhang, Ze1,2; Mao, Scott X.4 | |
2019-01-11 | |
发表期刊 | NATURE COMMUNICATIONS |
ISSN | 2041-1723 |
出版年 | 2019 |
卷号 | 10 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; Canada; USA |
英文摘要 | Shear-coupled grain boundary (GB) migration is of general significance in the deformation of nanocrystalline and polycrystalline materials, but comprehensive understanding of the migration mechanism at the atomic scale remains largely lacking. Here, we systematically investigate the atomistic migration of Sigma 11(113) coherent GBs in gold bicrystals using a state-of-art in situ shear testing technique combined with molecular dynamic simulations. We show that shear-coupled GB migration can be realised by the lateral motion of layer-by-layer nucleated GB disconnections, where both single-layer and double-layer disconnections have important contributions to the GB migration through their frequent composition and decomposition. We further demonstrate that the disconnection-mediated GB migration is fully reversible in shear loading cycles. Such disconnection-mediated GB migration should represent a general deformation phenomenon in GBs with different structures in polycrystalline and nanocrystalline materials, where the triple junctions can act as effective nucleation sites of GB disconnections. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000455474000001 |
WOS关键词 | RESOLUTION ELECTRON-MICROSCOPY ; MOLECULAR-DYNAMICS ; NANOCRYSTALLINE ALUMINUM ; MECHANICAL-BEHAVIOR ; DEFORMATION ; MOTION ; AL ; TEMPERATURE ; ENERGY ; COPPER |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/203590 |
专题 | 资源环境科学 |
作者单位 | 1.Zhejiang Univ, Sch Mat Sci & Engn, Ctr Electron Microscopy, Hangzhou 310027, Zhejiang, Peoples R China; 2.Zhejiang Univ, Sch Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China; 3.Univ Manitoba, Dept Mech Engn, Winnipeg, MB R3T 5V6, Canada; 4.Univ Pittsburgh, Dept Mech Engn & Mat Sci, Pittsburgh, PA 15261 USA |
推荐引用方式 GB/T 7714 | Zhu, Qi,Cao, Guang,Wang, Jiangwei,et al. In situ atomistic observation of disconnection-mediated grain boundary migration[J]. NATURE COMMUNICATIONS,2019,10. |
APA | Zhu, Qi.,Cao, Guang.,Wang, Jiangwei.,Deng, Chuang.,Li, Jixue.,...&Mao, Scott X..(2019).In situ atomistic observation of disconnection-mediated grain boundary migration.NATURE COMMUNICATIONS,10. |
MLA | Zhu, Qi,et al."In situ atomistic observation of disconnection-mediated grain boundary migration".NATURE COMMUNICATIONS 10(2019). |
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